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Vacuum isolating load switch

A load switch, vacuum isolation technology, applied in electrical switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., can solve problems such as causing danger, breakdown, and the insulation distance of the isolation knife does not reach a safe value, so as to ensure safety. performance effect

Active Publication Date: 2018-03-23
ZHEJIANG ZIGUANG ELECTRIC APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above scheme realizes the protection of the spring and improves the stability of the fixed knife switch, but it also has the following problems: after the end of the isolating knife is separated from the second insulating cylinder by rotating the isolating knife, a fracture is formed. At the moment when the two insulation cylinders are separated, the arc extinguishing chamber is not completely extinguished. At this time, the insulation distance between the end of the isolation knife and the second insulation cylinder does not reach a safe value. Under high voltage, the end of the isolation knife and the second insulation cylinder Breakdown may occur between insulating cylinders, causing danger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, the vacuum isolation load switch includes several sets of isolating knife assemblies 1, and each set of isolating knife assemblies 1 includes an isolating knife 1a, a first insulating post 1b, a second insulating post 1c, an insulating push rod 1d and a base 1e. The isolation knife assembly 1 is connected with an arc extinguishing chamber fast arc extinguishing transmission chain mechanism 2 and an arc extinguishing chamber 3 . The first insulating support 1b, the second insulating support 1c and the insulating push rod 1d are all installed on the base 1e, wherein the top of the first insulating support 1b is fixedly connected with the input wiring board 5, and the input wiring board 5 protrudes upwards to form a contact 5a The first end of the isolation knife 1a is provided with a contact groove 1a1 that can touch and connect with the contact 5a. The second end is hinged on the arc extinguishing chamber fast arc extinguishing transmission ch...

Embodiment 2

[0038] Such as Figure 8 As shown, in this embodiment, the structure of the vacuum isolation load switch is basically the same as that of Embodiment 1, the difference is that: the lever assembly 2h includes a lever body 2h5, and the upper part of the lever body 2h5 is on the two sides of the opening roller 2d. end, the middle part of the crank arm body 2h5 is hinged on the crank arm shaft 2i, the side wall of the lower part of the crank arm body 2h5 abuts against the outer edge of the cam 2g, and the limit notch 2g1 on the cam 2g is a concave arc-shaped notch, The end surface of the lower part of the crank arm body 2h5 is an arc surface, and when the isolation knife 1a rotates to a preset angle, the arc surface can be embedded in the arc-shaped notch and form a fit with the arc-shaped notch.

Embodiment 3

[0040] In this embodiment, the structure of the vacuum isolating load switch is basically the same as that of Embodiment 1, the difference is that the first end of the arc striker 4 is a plug, and the top of the first insulating support 1b is provided with a socket, and the plug and the socket are tightly fitted. , and when the pulling force received by the first end of the arc striking rod 4 exceeds the pressing force of the socket on the plug, the plug can come out of the socket. The connection and disconnection between the arc striker 4 and the first insulating support 1b are very convenient and quick by adopting the plug and the socket.

[0041]The working principle of the vacuum isolation load switch of the present invention is as follows: by operating the rotation angle of the isolation knife 1a, the arc extinguishing chamber can be opened and closed. The position starts to rotate around the top of the second insulating support 1c, and the first end of the isolation knif...

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Abstract

The invention, which belongs to the technical field of circuit breakers, provides a vacuum isolating load switch so that a problem that breakdown occurs between an isolating switch and an insulating cylinder of the exiting vacuum isolating load switch easily can be solved. The vacuum isolating load switch is composed of a plurality of groups of isolating switch assemblies; each group of isolatingswitch assemblies includes an isolating switch, a first insulating post and a second insulating post; and a first end of the isolating switch is connected with the top of the first insulating post movably and a second end of the isolating switch is hinged to the top of the second insulating post. The isolating switch assemblies also include arc strike rods with adjustable lengths; first ends of the arc strike rods are hinged to the isolating switches; second ends of the arc strike rods are connected to the tops of the first insulating posts movably; and the second ends of the arc strike rods can be disconnected with the tops of the first insulating posts completely after the isolating switches rotate around the tops of the second insulating posts at preset angles. Therefore, the breakdownphenomenon is avoided and the safety is improved.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers and relates to a vacuum isolation load switch. Background technique [0002] The working principle of the vacuum isolation load switch is similar to that of a circuit breaker. It is generally equipped with a simple arc extinguishing device, but its structure is relatively simple. When the brake is opened, under the action of the opening spring, the main shaft rotates sequentially. On the one hand, the piston is moved upward through the crank slider mechanism to compress the gas; The knife is opened first, and then the arc extinguishing knife is pushed to open the arc contact, and the compressed air in the cylinder blows out the arc through the nozzle. When switching on, through the main shaft and the transmission system, the main switch knife and the arc extinguishing knife are rotated clockwise at the same time, and the arc contact is closed first; the main shaft continues to rotate, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/666H01H33/664
CPCH01H33/664H01H33/666
Inventor 周鹤铭
Owner ZHEJIANG ZIGUANG ELECTRIC APPLIANCE
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